TM-9-2320-344-10

TRUCK, CARGO, GUIDED MISSILE TRANSPORTER (GMT), 8X8, M985A4GMT

TECHNICAL MANUAL; OPERATOR'S MANUAL

OCTOBER 2008

TM-9-2320-344-10 - Page 121 of 1012

Alison

TRAILER

AIR SUPLY

M

M

TURBINE SPEED

SENSOR

TCM

OUTPUT

SPEED

SENSOR

ENGINE SPEED

SENSOR

CONTROL VALVE

MODULE

1

2

Figure 2.

The TCM also protects the transmission from cold weather startups by inhibiting normal

shifting functions until a minimum sump temperature of 20°F (-7°C) is attained.

A check transmission indicator (2) located on the instrument panel alerts the operator,

momentarily, every time the system is activated as a lamp check, and when the TCM finds

a problem in the system.

If check transmission indicator (2) comes on during vehicle operation, the transmission will

continue to operate normally, in most cases. However, in some cases, the TCM will take

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